From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f198.google.com (mail-wr0-f198.google.com [209.85.128.198]) by kanga.kvack.org (Postfix) with ESMTP id 2E09B6B0292 for ; Sun, 11 Jun 2017 15:44:33 -0400 (EDT) Received: by mail-wr0-f198.google.com with SMTP id w91so18706636wrb.13 for ; Sun, 11 Jun 2017 12:44:33 -0700 (PDT) Received: from mail.skyhub.de (mail.skyhub.de. [5.9.137.197]) by mx.google.com with ESMTP id t31si7967883wrc.248.2017.06.11.12.44.31 for ; Sun, 11 Jun 2017 12:44:31 -0700 (PDT) Date: Sun, 11 Jun 2017 21:44:11 +0200 From: Borislav Petkov Subject: Re: [PATCH v6 18/34] x86/efi: Update EFI pagetable creation to work with SME Message-ID: <20170611194411.shbwwf34ftumipab@pd.tnic> References: <20170607191309.28645.15241.stgit@tlendack-t1.amdoffice.net> <20170607191627.28645.4398.stgit@tlendack-t1.amdoffice.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20170607191627.28645.4398.stgit@tlendack-t1.amdoffice.net> Sender: owner-linux-mm@kvack.org List-ID: To: Tom Lendacky Cc: linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rik van Riel , Radim =?utf-8?B?S3LEjW3DocWZ?= , Toshimitsu Kani , Arnd Bergmann , Jonathan Corbet , Matt Fleming , "Michael S. Tsirkin" , Joerg Roedel , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Brijesh Singh , Ingo Molnar , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander Potapenko , Dave Young , Thomas Gleixner , Dmitry Vyukov On Wed, Jun 07, 2017 at 02:16:27PM -0500, Tom Lendacky wrote: > When SME is active, pagetable entries created for EFI need to have the > encryption mask set as necessary. > > When the new pagetable pages are allocated they are mapped encrypted. So, > update the efi_pgt value that will be used in cr3 to include the encryption > mask so that the PGD table can be read successfully. The pagetable mapping > as well as the kernel are also added to the pagetable mapping as encrypted. > All other EFI mappings are mapped decrypted (tables, etc.). > > Signed-off-by: Tom Lendacky > --- > arch/x86/platform/efi/efi_64.c | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) patches 15-18: Reviewed-by: Borislav Petkov -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org